Abstract
Considerable research has been conducted in central Iowa to study potassium (K) fertilization rates and placement methods on corn and soybean grain yield, K uptake, and soil-test K values. However, no research has investigated K recycling to the soil by maturing plants and crop residue until the next crop is planted. The amount and the timing of the K recycled to the soil should have a significant impact on soil-test K values, and should explain a great deal of usually very high soil-test K temporal variability. Therefore, plots of several field K trials in central Iowa were used to investigate these issues.
Keywords: RFR A12129, Agronomy
How to Cite:
Mallarino, A. P., Oltmans, R. R. & Fiscus, M. W., (2013) “Potassium Effects on Yield of Corn and Soybean and on Potassium Uptake and Recycling to the Soil”, Iowa State University Research and Demonstration Farms Progress Reports 2012(1).
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